Though not officially labeled as a 2016 presidential announcement by his office, Marco Rubio has reserved the Freedom Tower in Miami for an undisclosed event on April 13, 2015. The likely scenario is that Rubio will either announce a run for President or announce that he is forgoing a presidential run to focus on re-election to the U.S. Senate. Signs point to the former as being more likely.

Report from the Miami Herald:

Marco Rubio has reserved the Freedom Tower in downtown Miami for an undisclosed event April 13, which appears to be a potential, if not likely, spot for Florida’s junior senator to announce his candidacy for president.

A Rubio adviser stressed nothing has been nailed down for any kind of announcement, but the timing makes sense: Likely presidential candidate Rand Paul is expected to make things official April 7, followed by a five-day, five-state announcement tour, so Rubio presumably would not want to share the spotlight during that period.

All-but-announced candidate Jeb Bush appears to be in no rush to shift more formally into campaign mode, but Texas Sen. Ted Cruz made his announcement this week, and Democrat Hillary Clinton is expected to make her campaign announcement in April as well, though nothing has been set.

Rubio has been fluctuating all over the polls but many analysts believe Chris Christie’s lack of traction has given the junior Senator from Florida an opening. However, he’s been fighting an uphill battle with conservatives since his staunch and ardent support for an immigration reform bill which includes a path to citizenship for people already ion the country illegally.

He’s been positioning himself as the “foreign policy candidate” in recent weeks, speaking out on the topic of Iran and Yemen.